2 turbo questions. Turbo size and manifold
11-11-2008, 08:26 PM
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2 turbo questions. Turbo size and manifold I was just comparing different setups of twin kits and i was just wondering how much hp ant tq increase there is with a header style to cast manifold truck/c6 setup per pound of boost. Also for a 402/408 would a big 67mm precision balll bearing be best or 76mm be better for 900 to near 1000 rwhp
11-11-2008, 08:43 PM
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I was just comparing different setups of twin kits and i was just wondering how much hp ant tq increase there is with a header style to cast manifold truck/c6 setup per pound of boost. Also for a 402/408 would a big 67mm precision balll bearing be best or 76mm be better for 900 to near 1000 rwhp
The 408 will pump more air then a 67mm turbo could and become a restriction
11-11-2008, 09:26 PM
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I figured they would the engine will have 8:5:1 comp forged callies crank oliver rods and nice pistons total seal rings etc. I jut didnt want them to be too big and not workk in there efficienecy range. But i also would like to keep the boost as low as possible to help keep from pushing water. and i want to make sure the back pressure wont be an issue either. Ill be running 2 tial 44 wastegates . i dont want boost creep.
